Slide for extension-tables



(No Model.)

0. F. HALL.

SLIDE EOE EXTENSION TABLES. I

No. 451,820. Patented May 5,1891.,

a I' i 1T 0 JL 4L UNITED STATES PATENT ()EETCE.

CHARLES F. HALL, OF \VESTON, OHIO SLIDE FOR EXTENSION-TABLES.

SPECIFICATION forming part of Letters Patent No. 451,820, dated May 5, 1891.

Application filed September 5,1390- Serial No. 364,042. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES F. HALL, a citizcn of the United States, residing at \Veston, in the county of V000. and State of Ohio, have invented new and useful Improvements in Slides for Extension-Tables, of which the following is a specification.

My invention relates to a new and useful improvement in slides for extension-tables; and it. consists in the construction and arrangement of parts, as hereinafter described andclaimed.

The object of my invention is to provide and construct an extension-slide which will embody simplicity, rigidity, and cheapness. This object I attain by the construction illustrated in the accompanying drawings, forming a part of this specification, wherein like letters of reference indicate corresponding parts in the several figures, in which Figure l isaviewin perspective of the slide extended, and Fig. 2 is a detail perspective of one of the dovetails.

In the drawings, A represents the slides, which may be arranged in a series of two or more, these slides being provided on their adjacent faces with dovetail grooves B, extending their entire length. To unite the slides and permit a longitudinal adjustment of the same relative to each other, I employ a dovetail or block 0, preferably formed of a single piece of metal rectangular in form and having the opposite edges of their end portions cut away or formed into a V-shaped recess D, while the lower forward edge of the bottom plate is beveled and extends the entire length of the casting, as at E, and has a recess F at or about its center. The upper plate opposite the beveled edge is also beveled'in an opposite direction for a short distance only, the remaining portion being cut away, forming a straight vertical edge G. The edge of the casting directly opposite the edge G is formedin substantially the same manner, its beveled portion being, however, arranged at the opposite end. On the opposite side of the lower plate is a beveled stop H, directly beneath the beveled portion on the top plate in the rear. The remaining portion on the bottom plate in the rear is preferably cut away and straight. The end plates of the casting are reduced to occupy a portion only of the entire width,

whereby they are permitted to easily pass in and out of the dovetail groove. The plates are secured in the grooves by suitable staples or bolts I, passing through the dovetails at the notch F and through suitable apertures in the wood. The dovetails are thereby securely fastened in the slides at opposite ends on opposite sides.

To prevent the slides from becoming disengaged I insert through the inclined edges of the dovetail grooves suitable stops or pins K, against which the shoulders of the cut-away portion of the dovetail engage.

The operation of my device is as follows: hen the pieces are united, the dovetails are inserted in their respective grooves, being secured, as specified, on opposite ends and opposite sides of the slides. As the slides are drawn out the ends of the dovetails contact and prevent their further movement in that direction. When they are closed, the beveled shoulders in the dovetails engage with the stops K and prevent a further movement of the slides. The position of the stops and the shoulders permits the ends of the slides to come out flush with each other, the remaining portion of the slide, owing to its extension, being adequate to form a sufficient support for the load on the slide without sagging or otherwise binding or injuring the walls of the grooves. The cut-away portion of the casting at the end permits the same to pass the stops, allowing engagement with the inclined edges.

I am aware that many minor changes in the construction and arrangement of the parts of iny device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- In an extension-table slide, the combination, with the slide having dovetail grooves in its opposite sides, of the dovetail fitted in and secured in the grooves, consisting of a rectangular casting having V-shaped grooves in its ends on opposite sides and cut-away portion opposite said grooves and beveled lower edge on one side of the lower plate having a recess F therein, a beveled extension II opposite said edge formed by reducing the Width of In testimony whereof I affix my signature in the plate, and the top plate having beveled presence of two Witnesses. extensions qn its opposite ends and sides formed by reducing the thickness of the plate, CHARLES F. H ALL. 5 and stops Kin the slides, with which the bev- Witnesses:

eled extensions on the dovetails engage, snb- ELMER E. STEARNS,

stantially as described. G. P. THOMPSON. 

